Random Misfire

[racnaa]

Ok, I have a 2000 expedition 5.4 L stock. I have replaced all the spark plugs, all coil packs and boots, and I still have a random misfire. Not enough to throw a check engine light on, but enough to make it idle sloppy, and be felt at around 2000 rpm's. Any Ideas? Gettin kinda frustrated and broke. lol

 

[racnaa]

PCV valve.

 

[Big Red Monster]

Did u change the elbow too or just the valve? I changed the whole assembely on mine, idle got to much better

 

[racnaa]

Changed the valve. All was good for a few hours today. Then on the way home from dinner, i lost a cylinder again. I guess one of the 8 brand new Accel coil packs let go!!!!!! Geez!!! this thing is ****** me off!!